JPS623321A - Optical disk controller - Google Patents

Abstract

PURPOSE:To read out a spare track in the minimum processing time with an optical disk device by providing a memory and an optical disk controller to an optical disk controller. CONSTITUTION:An optical disk controller reads previously a physical address ID out of a spare track of an optical disk device 6. The address ID shows a specific sector of a data track to which the relevant data corresponds. Then the address ID is held by a memory 5. If no data is detected on the data track when a reading action is carried out, the ID of the spare track of the device 6 held previously by the memory 5 is searched. The corresponding track is sought when a seeking action is through with the head of the spare track of the device 6. Then the data on the spare track of the device 6 is read out.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an optical disc control device, and more particularly to an optical disc control device that performs read processing of a spare track.

2. Description of the Related Art In the read processing in a conventional optical disk control device, when data is not found in a data track, the ID of the spare track is searched for one track at a time to find the required data, and the spare track is read out. Ta.

Problems to be Solved by the Invention However, as described above, the conventional optical disc control device has a disadvantage in that it requires seek time and rotational waiting time equal to the number of spare tracks to be searched.

The present invention has been made in view of the above-mentioned conventional circumstances, and
Accordingly, an object of the present invention is to provide a novel optical disc control device that makes it possible to eliminate the above-mentioned drawbacks inherent in the conventional technology. □' Means for Solving the Problems In order to achieve the above object, an optical disc control device fit according to the present invention is configured to include a memory and an optical disc control circuit. The memory holds information indicating the physical address of the data written on the spare track of the optical disc device. In the above configuration, if data is not found in the data track when the optical disk device performs a read operation, the ID of the data held in the memory is searched instead of searching for the ID of the data in the spare track. Turns on to read the track data.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of an optical disc control device according to the present invention, and FIG. 2 is a diagram showing a format of an optical disc medium used in an embodiment of the present invention.

In FIG. 2, data is normally written to data sectors within data tracks. However, if the medium is defective, the data will be written to a spare sector on the same track, or to a spare track if there are not enough spare sectors, along with an ID indicating the physical address in front of the data sector. .

In FIG. 1, one embodiment of the present invention includes a direct memory access (hereinafter abbreviated as "iDMA") control circuit 2 that controls data transmission and reception with a common data transfer path 1 (hereinafter abbreviated as a bus), and an optical disk. an optical disc control circuit 4 that controls the device@6, a memory 5, a DMA control circuit 2,
It includes an optical disc control circuit 4 and a firmware control circuit 3 that controls a memory 5.

The optical disk controller rIt is configured in advance as an optical disk controller@
A physical address (hereinafter abbreviated as ID) indicating which sector of the data track the data corresponds to is read out from the spare track 6 and held in the memory 5. When data is not found on the data track during read processing and data is read from the spare track, first a seek command is sent to the optical disk device 6 to seek to the beginning of the spare track, and the optical disk device 6 performs the seek operation. During execution, the ID of the spare track of the optical disk device 1116 held in the memory 5 is searched, and it is investigated in which sector of the spare track the necessary data exists. And optical disc device 1!
When the seek to the beginning of the spare track No. 6 is completed, a seek to the corresponding track is performed, and the optical disc device ff1
6's spare track data'' is read out, and the kneeling control circuit 2
The data is transferred to path l via.

One Effect of the Invention As described above, according to the optical disc control device of the present invention, it is possible to execute the read operation of the spare track in the minimum processing time in the read processing of the optical disc device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of an optical disc control device according to the present invention, and FIG. 2 is a diagram showing the format of an optical disc medium used in one embodiment of the present invention. 1--Common data transfer path (bus), 2--Direct memory access (DMA) control circuit, 3--Firmware control circuit, 4-Function optical disk control circuit, 5--
Memory, 6... Optical disk device Figure 1 Figure 2

Claims (1)

[Claims] In an optical disk processing system including an optical disk device and an optical disk control device, the optical disk control device includes a memory and an optical disk control circuit, holds information indicating a physical address of data written in a spare track of the optical disk device in the memory, and An optical disc control device, characterized in that when data is not found in a data track when the device performs a read operation, the data in the spare track is directly read out by searching for an ID held in the memory.